In recent years, when wheat matures, large white panicles often appear, resulting in serious reduction of yield. Farmers' friends do not know the real reason. In fact, this is because wheat is infected with sheath blight and head blight.
First, the cause (a) The cause of sheath blight is wheat density is too large, poor ventilation in the field, infected with Rhizoctonia in the soil. The specific manifestation is that there are dark spots on the roots of wheat stems. In severe cases, the dark spots become white spots. At this time, the wheat stems have been completely rotted, and the stem base root nutrients cannot be supplied to the upper half, causing the wheat stems and ears to all die white. (2) Fusarium head blight is caused by rain in the flowering stage of wheat. The rain brought the Fusarium head blight in the air into the wheat glume, causing the wheat to stop filling. Some scabs are infected with scab, while others are infected with scab, and the ears stop growing and gradually turn white.
Second, prevention and control measures (A) control of sheath blight. Before and after wheat heading, use 50% of Jinggangmycin solution per acre for 220-250 ml and spray 50-70 kg of water. (b) Prevention and control of head blight. Spray 50% carbendazim or 50% thiophanate-methyl wettable powder immediately after the wheat is pumped. If there is a rainy weather during the wheat flowering season, it should be sprayed before the rain. If no spray is applied before the rain, remedial measures will be made in the rain-stopping interval. After 7 days, spraying is better.
The breeder of the new varieties of wheat in the National Examination Zhongyuan 98-68, Zhengzhou Liuhu Seed Co., Ltd. Liu Hu agronomist reminded farmers that all farmers who cultivated Zhongyuan 98-68 wheat should pay attention to the prevention and control of these two diseases due to the strong ability of this breed to carry out High density, easy to infect the sheath blight, flowering during the rain is equally susceptible to head blight. Such as timely prevention and treatment, the general production of the species can reach 500 kilograms. This year's wheat encounters a warm winter, serious pests and diseases, coupled with the overheated wheat groups caused by the warm winter, seriously affecting the ventilation and light transmission, will increase the occurrence of wheat pests and diseases, I hope the majority of farmers do not take it lightly and strengthen the prevention of pests and diseases.
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